The microscopic four-digit code in the bottom-right corner of a card—the Pack Code—is the difference between a common reprint and a first-edition masterpiece worth hundreds of dollars. For the competitive Duelist, these details are more than trivia; they are the architectural blueprints of a winning strategy.

The Art of Organization: Strategic Sorting

Managing a card collection is an exercise in balancing aesthetic appreciation with mechanical utility. This catalog moves you beyond fanning through physical binders. It acknowledges that a collection is a living library of tactical options. By documenting the Level, Type, and Category of every monster, spell, and trap, you turn a pile of cardboard into a searchable database of potential.

The structure handles the specific data points that define the meta-game. Whether you are filtering for "Level 4" monsters to optimize your Xyz summons or searching for specific "Types" to trigger synergy effects, having this data digitized allows you to "deck build" in your head while away from your physical collection.

Search & Retrieval: Finding the Win Condition

In a collection of thousands, finding that one specific tech card can be a nightmare.

  • The Combat Stats: Fields for ATK and DEF allow you to sort your collection by raw power or defensive utility. This is essential when trying to find a monster that can overcome a specific "boss" monster in your local tournament scene.
  • The Scarcity Marker: The Rarity and Pack Code fields are your tools for trade and valuation. Knowing you have three "Ultra Rare" copies of a card without needing to un-sleeve them is a massive advantage at a trade table.
  • Inventory Integrity: The Owned field is your protection against over-purchasing. It answers the critical question: "Do I have enough copies for a full playset?"

Curating the Archive: The Deck Builder's Star

A collection is not just about what you have; it's about what you use. By using Memento’s rating or filtering features, you can identify your "core" cards—those designated for your current competitive deck. You can group your library by Category, allowing you to see at a glance if your deck's ratio of monsters to spells is drifting out of balance.

Power Feature: Aggregation for Collection Value

By using Memento’s aggregation tools on the Owned field, you can see the total volume of your archive. Combined with external price guides, this structured data becomes the foundation for a professional insurance appraisal or a high-value sale. It transforms a childhood hobby into a quantified, documented investment portfolio.